Commit 16b535e2dd9075956c9ad47f2193fadf19a781b6
2010-11-23T23:54:37
Add some code comments.
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diff --git a/cpu-miner.c b/cpu-miner.c
index 4fa6d9b..a78e13f 100644
--- a/cpu-miner.c
+++ b/cpu-miner.c
@@ -281,6 +281,7 @@ static const uint32_t init_state[8] = {
0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19
};
+/* suspiciously similar to ScanHash* from bitcoin */
static uint32_t scanhash(unsigned char *midstate, unsigned char *data,
unsigned char *hash1, unsigned char *hash)
{
@@ -320,9 +321,11 @@ static void submit_work(struct work *work)
printf("PROOF OF WORK FOUND\n");
+ /* build hex string */
for (i = 0; i < sizeof(work->data); i++)
sprintf(hexstr + (i * 2), "%02x", work->data[i]);
+ /* build JSON-RPC request */
if (asprintf(&s,
"{\"method\": \"getwork\", \"params\": [ \"%s\" ], \"id\":1}\r\n",
hexstr) < 0) {
@@ -333,6 +336,7 @@ static void submit_work(struct work *work)
if (opt_debug)
fprintf(stderr, "DBG: sending RPC call:\n%s", s);
+ /* issue JSON-RPC request */
val = json_rpc_call(url, userpass, s);
if (!val) {
fprintf(stderr, "submit_work json_rpc_call failed\n");
@@ -353,6 +357,7 @@ static int main_loop(void)
struct work *work;
uint32_t nonce;
+ /* obtain new work from bitcoin */
val = json_rpc_call(url, userpass, rpc_req);
if (!val) {
fprintf(stderr, "json_rpc_call failed\n");
@@ -365,6 +370,7 @@ static int main_loop(void)
free(s);
}
+ /* decode result into work state struct */
work = work_decode(json_object_get(val, "result"));
if (!work) {
fprintf(stderr, "work decode failed\n");
@@ -373,9 +379,11 @@ static int main_loop(void)
json_decref(val);
+ /* scan nonces for a proof-of-work hash */
nonce = scanhash(work->midstate, work->data + 64,
work->hash1, work->hash);
+ /* if nonce found, submit work */
if (nonce) {
submit_work(work);